AR_IMR_S2
REG_WRITE(ah, AR_IMR_S2, REG_READ(ah, AR_IMR_S2) | AR_IMR_S2_GTT);
mask = REG_READ(ah, AR_IMR_S2) &
REG_WRITE(ah, AR_IMR_S2, mask | mask2);
REG_RMW_FIELD(ah, AR_IMR_S2,